KR20080101589A - Pipe extrusion machine with wedge-shaped protrusions formed on the inner circumference - Google Patents

Abstract

The present invention relates to a pipe extrusion molding device having a wedge-shaped protrusion formed on an inner circumferential surface thereof; A toperto housing having a through hole formed therein, a sizing dice having a through hole formed therein and coupled to a rear end of the topeto housing, and a topeto provided with a resin supply unit at one side thereof; It is connected to the resin supply unit is coupled to the rear end of the topeto, the molding die is installed inside the sizing dice, the inner space of the sizing dice coupled to the tofeto housing and the outer space of the molding die coupled to the tofeto housing It is a basic feature of what consists of what consists of resin conveyance parts.

According to the present invention, in manufacturing a synthetic resin pipe having a wedge-shaped protrusion on an inner circumferential surface, there is an advantage of preventing the occurrence of defects such as deformation by maintaining the shape of the wedge-shaped protrusion as well as strengthening the strength of the hollow pipe. .

Description

A extrusion molding system for having wedge-shaped tooth in pipe}

1 is a cross-sectional view showing the configuration of a pipe extrusion machine having a wedge-shaped protrusion formed on an inner circumferential surface thereof according to the present invention;

Figure 2 is a cross-sectional view of the forming die of the pipe extrusion molding device formed with a wedge-shaped projection on the inner peripheral surface according to the present invention,

Figure 3 is a cross-sectional view of another embodiment of the molding die of the pipe extrusion molding device formed with a wedge-shaped projection on the inner peripheral surface according to the present invention,

Figure 4 is a longitudinal cross-sectional view of a synthetic resin pipe manufactured by a pipe extrusion machine formed with a wedge-shaped protrusion on the inner peripheral surface according to the present invention,

5 is a cross-sectional view of FIG. 4,

6 is a cross-sectional view of an embodiment in which a connection neck is installed in a pipe extrusion molding device having a wedge-shaped protrusion formed on an inner circumferential surface thereof according to the present invention.

7 is a cross-sectional view of another embodiment in which a connection neck is installed in a pipe extrusion molding device having a wedge-shaped protrusion formed on an inner circumferential surface thereof according to the present invention.

* Explanation of symbols for main parts of the drawings

1: pipe extrusion machine 10: topeto housing

20: sizing dice 23: cold and hot unit

30: toppeto 33: spiral projection

34: resin supply part 40: molding dice

43: wedge protrusion 45: vacuum forming unit

50: air cooling unit 60: resin transfer unit

70: insulation plate 80: topeto housing extension

85: neck 90: sizing dice extension

The present invention relates to a pipe extrusion molding device having a wedge-shaped protrusion formed on the inner circumferential surface, and more particularly, to manufacturing a synthetic resin pipe having a wedge-shaped protrusion formed on the inner circumferential surface, as well as the shape of the wedge-shaped protrusion. The present invention relates to a pipe extrusion apparatus in which a wedge-shaped protrusion is formed on an inner circumferential surface so that the defect is not caused due to deformation.

In general, extrusion molding is a type of synthetic resin molding, which refers to molding by heating and melting synthetic resin by using an extruder, and is composed of an extruder, a die, a sizing die, a cooling device, a drawing device, and a cutting device. The resin is put into the hopper attached to the extruder, and the melted resin is pushed toward the extrusion die by the rotation of the screw inside the extruder, and is molded by a certain shape of the extrusion die, and the product is sized through the sizing die, which is cooled, It means to solidify and mold the product continuously.

That is, extrusion molding is a method of continuously producing products such as pipes, mold release products, sheets, films, coated wires, etc. by extruding heat-softened thermoplastic synthetic resin using an extruder. The synthetic resin is put into it, heated and softened, and then extruded from a die to cool or cut the product through a cooling step.

When the pipe is manufactured by using the general extrusion molding method as described above, the product passing through the sizing dice maintains the predetermined pipe shape through the cooling process, but only undergoes the cooling process. There was a problem that can not manufacture the pipe.

In addition, the general pipe extrusion method is manufactured so as to extend to the outer circumferential direction of the pipe in the sizing die to have a predetermined size and shape, so that when the wedge-shaped protrusion is formed on the inner circumferential surface of the pipe, the wedge having a sharp shape due to deformation is formed accurately. There was a problem that can not be.

Accordingly, the present invention has been made to solve this problem, the object of which is to vacuum the inside of the pipe with a hollow through the vacuum forming unit installed in the sizing die coupled to the toppeto of the molding apparatus during extrusion of the pipe By forming a suction force in the inner surface of the pipe to be formed by cooling the inner surface of the pipe to be molded in close contact with the sizing die, so that the roundness and the wedge shape in the longitudinal direction and the pitch of the hollow portion is accurately maintained It is aimed to provide a pipe extrusion molding device in which a wedge-shaped protrusion is formed on an inner circumferential surface of which the molding can be formed, and thus, stepwise and stable cooling can be performed in the sizing die and the outside of the molding die. .

The present invention for achieving the above object; A toperto housing having a through hole formed therein, a sizing dice having a through hole formed therein and coupled to a rear end of the topeto housing, and a topeto provided with a resin supply unit at one side thereof; It is connected to the resin supply unit is coupled to the rear end of the topeto, the molding die is installed inside the sizing dice, the inner space of the sizing dice coupled to the tofeto housing and the outer space of the molding die coupled to the tofeto housing It is characterized by consisting of a resin transfer unit.

Here, the outer side of the molding die is characterized in that the air cooling unit is further installed.

And, the rear end of the molding die is characterized in that the vacuum molding unit is further installed.

In addition, the forming die is characterized in that the wedge-shaped projection is formed in the longitudinal direction on the outer peripheral surface.

In addition, the forming die is provided with a through-hole at a central portion thereof, and a first inner heater is installed at all of the inside of the through-hole, and an inner cold / hot unit is installed at the rear portion.

On the other hand, the topeto housing is characterized in that the third, fourth external heater is installed on the outer peripheral surface.

In addition, the topeto is characterized in that the spiral projection is formed on the outer peripheral surface in contact with the topeto housing.

In addition, the topeto is screwed with the first fastening bolt to the outer end of the topeto housing, a hollow portion is formed on the inner side is coupled with the molding die, the hollow portion is formed in the first and second holes to communicate with the outside It is characterized by.

In addition, the topeto is characterized in that the fifth external heater is installed on the outer circumferential surface.

In addition, the sizing die is characterized in that a portion of the topper and the molding die is installed therein.

And, the outer circumferential surface of the sizing dice is characterized in that the cold air unit and the first and second external heaters are installed, the air cooling unit support for supporting the air cooling unit is installed.

On the other hand, the molding die is characterized in that the first molding die and the second molding die is combined.

In addition, the insulating plate is interposed between the first molding die and the second molding die.

In addition, the topeto housing and the sizing die is formed between the topeto housing extension portion and the sizing dice extension, characterized in that the connection between the topeto and the molding die is formed.

And, the topeto housing extension portion and the sizing die extension portion is characterized in that the thickness adjustment bolt is formed.

Pipe extrusion machine formed with a wedge-shaped projection on the inner peripheral surface according to the present invention will be understood by the embodiments described in detail below with reference to the accompanying drawings.

At this time, Figure 1 is a cross-sectional view of the configuration of the pipe extrusion machine formed with a wedge-shaped projection on the inner circumferential surface according to the present invention, Figure 2 is a cross-sectional view of the forming die of the pipe extrusion molding device is formed with a wedge-shaped projection on the inner peripheral surface, 3 is a cross-sectional view of another embodiment of a molding die of a pipe extrusion machine having a wedge-shaped protrusion formed on an inner circumferential surface of the present invention, and FIG. 4 is a synthetic resin produced by a pipe extrusion machine having a wedge-shaped protrusion formed on an inner circumferential surface of the present invention. 5 is a longitudinal sectional view of the pipe, and FIG. 5 is a cross sectional view of FIG. 4.

First, according to FIG. 1, a pipe extrusion machine having a wedge-shaped protrusion formed on an inner circumferential surface according to the present invention is mixed with an extruder to push a molten resin toward an extrusion machine to make a pipe of a predetermined shape, and then cooled and solidified continuously. Forming the pipe, the configuration is largely configured toperto housing 10, the through-hole is formed therein, the sizing dice 20 is coupled to the topeto housing 10, the topeto housing 10 and sizing The toperto 30 and the molding die 40 are coupled to the through-holes in which the die 20 is coupled, and one side end of the topeto 30 is coupled to the outer end of the topeto housing 10. .

At this time, a space portion is formed on the inner side of the sizing dice 20 coupled to the topeto housing 10 and the outer side of the molding die 40 coupled to the topeto 30, and the space portion is formed in the topeto 30. It is connected to the resin supply portion 34 formed in the center of the resin transfer portion 60 to form.

Here, the molding die 40 has an air cooling unit 50 is installed on the outside, the vacuum molding unit 45 is installed on the outside of the rear end (left end as seen in Figure 1), the through hole ( 47 is formed, and the inner side of the through-hole 47 is provided with an inner cold and hot unit 48, and is coupled to the topeto 30, the first inside of all of the through-holes 47 formed therein The heater 22 is to be installed.

In addition, the toperto housing 10 is provided with a toperto 30 therein, and the third and fourth external heaters 14c and 14d are installed on the outer circumferential surface thereof.

On the other hand, the topeto 30 is screwed to the outer end of the topeto housing 10 by the first fastening bolt 39, the outer peripheral surface is formed with a resin transfer passage consisting of a spiral projection 33, the A hollow portion 31 is formed at one side coupled to the molding die 40, and first and second holes 36 and 38 formed to penetrate the hollow portion 31 and the outside are formed.

That is, the topeto 30 is screwed with the first fastening bolt 39 on the outside of the topeto housing 10, the resin supply unit 34 is formed in the center, the resin supply unit 34 is the toe A resin transfer part 60 is formed in which the space portion between the resin supply passage formed by the spiral protrusion 33 formed on the outer circumferential surface of the peto 30 and the inner circumferential surface of the topeto housing 10 is connected.

The first through hole 36 through which the vacuum pipe and the heater wire pass through the circumferentially outer side of the resin supply part 34, and the coolant pipe 49 through which the coolant or oil is supplied to the inner cold / hot unit 48 pass. The second through hole 38 is formed.

In addition, the sizing die 20 has a part of the toffee 30 and a molding die 40 installed therein, and first and second external heaters 14a and 14b are installed on the outer circumferential surface thereof. Cooling and cooling unit 23 is installed together, at the same time one side of the outer circumferential surface of the air cooling unit support for fixing the air cooling unit 50 is installed.

Hereinafter, each of the above components will be described in more detail.

Pipe extrusion apparatus 1 for forming a wedge-shaped projection on the inner circumferential surface of the present invention may be configured in the shape of a topeto housing (10) in the shape of a square or cylindrical, but preferably cylindrical.

As shown in FIGS. 1 and 2, the sizing die 20 is coupled by a second fastening bolt 29 to the rear portion of the toffee housing 10 surrounding the toffee 30 so as to be disassembled and assembled. , The tip portion is also screwed by the first fastening bolts 39 so that the disassembly and assembly is possible. That is, a flange is formed on all of the sizing dice 20, and the flange is coupled to be fitted to the rear end of the toffee housing 10 so that the second fastening bolt (10) is formed at the sizing die 20 to the tofeto housing 10. 29) by using a bolt 19 fastened to the outer circumferential surface of the stepped portion formed in the rear end of the topeto housing 10 to adjust the thickness of the resin transfer unit 60 can be adjusted to the thickness of the pipe to be formed .

By doing so, a space portion is formed between the inner circumferential surface of the topeto housing 10 and the sizing dice 20 at the outer circumferential portion of the topeto 30. Is connected to form a resin transfer unit 60 through which the synthetic resin material in a molten state is supplied from the extruder (not shown) through the resin supply unit 34.

At this time, the outer circumferential surface of the toperto 30 forms a spiral protrusion 33 to allow the molten synthetic resin material that passes through the resin transfer part 60 to pass through the resin transfer part 60 without being subjected to great resistance. The sending unit 60 is extended to the rear end of the sizing die 20, the pipe extruder (1) is formed by connecting the topeto 30, tofeto housing 10 and the sizing dice 20 On the outer circumferential surface of the outer body, first to fifth external heaters 14a, 14b, 14c, 14d, and 14e are installed to prevent quenching of the molten resin passing through the resin transfer part 60, and gradually step by step (H5 to H1). Will be cooled.

In addition, the toperto 30 is installed inside the toperto housing 10, and a hollow portion 31 is formed at one side thereof coupled to the molding die 40 at the center thereof, and the hollow portion ( On the other side of the 31 is formed a first through-hole 36, which is provided with a vacuum and heater pipe 46 consisting of a vacuum pipe and a heater wiring 46, a second through hole (49) through which a coolant pipe 49 through which cooling water or oil passes ( 12) is formed, the screw portion 35 is formed on the inner circumferential surface of the accommodating portion 35 in which the step is formed in the hollow portion 31 inside the rear part so that the molding die 40 is screwed together.

The second internal heater 32 formed on the inner circumferential surface of the topetto 30 is formed by passing the vacuum and the heater pipe 46 and the cooling water pipe 49 through the hollow part 31 of the topetto 30 configured as described above. Electricity and cooling water are supplied to the first internal heater 22 and the inner cold / hot unit 48 installed inside the die 40, and the vacuum forming unit 45 installed at the rear end of the forming die 40 is filled with dust. To create pneumatic pressure.

At this time, the first internal heater 22 and the second internal heater 32 and the inner cold / hot unit 48 prevent quenching of the molten resin passing through the resin transfer part 60 so that the molten resin is suitable for forming a pipe. To maintain the temperature.

In addition, the sizing dice 20 connected to the rear end of the topeto housing 10 have a through hole formed therein, and the through hole is connected to the rear end of the topeto 30 by screwing. Molding die 40 is to be installed.

The sizing die 20 has a space portion formed on an outer circumferential surface to which the topeto 30 and the molding die 40 are connected, and the space portion forms a rear portion of the resin transfer portion 60 extending from the resin supply portion 34. The first and second external heaters 14a and 14b are provided on the outer circumferential surface, and a cold / hot unit 23 that is cooled by cooling water or oil is provided.

In addition, the rear of the sizing die 20 is provided with an air cooling unit support 25 for supporting the air cooling unit 50, the air cooling unit 50 is formed with a wedge-shaped projection on the inner peripheral surface according to the present invention In order to prevent deformation by appropriately cooling the pipe, it is preferable that the air cooling unit support 25 has a structure in which the gap between the pipe and the front and rear directions can be easily adjusted.

In addition, the forming die 40 is configured to form the exact shape and shape of the wedge-shaped protrusion 82 in the process of manufacturing the pipe is formed with a wedge-shaped projection on the inner peripheral surface to be manufactured on the outer peripheral surface of the molding die 40 The wedge-shaped protrusion 43 having a shape corresponding to the wedge-shaped protrusion is formed.

In addition, a through hole 47 is formed at the center of the forming die 40 so that the vacuum pipe, the heater wiring, and the cooling water pipe passing through the inside of the toperto 30 pass through the through hole 47. The first inner heater 22 is installed on all of the inner circumferential surface of the inner circumferential surface thereof, and an inner cold / hot unit 48 that is cooled by cooling water or oil is installed on the rear surface of the inner circumferential surface.

In addition, a vacuum molding unit 45 is installed at the last end of the molding die 40, that is, on the outer side of the opposite side of the toffee 30, and the vacuum molding unit 45 is formed on the outer peripheral surface of the rear end of the molding die 40. The vacuum pipe 45a is installed to be inserted and connected to a plurality of suction holes 41 formed in the center of the forming die 40 on the surface thereof so that the wedge-shaped protrusions formed on the inner circumferential surface of the pipe are formed accurately. The suction force is applied inwardly by the vacuum, and when the wedge-shaped protrusion is formed, the air supplied from the separate air supply device is introduced into the air supply port 54 to be appropriately cooled to be injected into the air discharge hole 52. The configured air cooling unit 50 is further installed.

Therefore, the pipe molded body that has passed through the sizing die 20 while maintaining a predetermined shape passes through the forming die 40 having a wedge-shaped protrusion formed on the inner circumferential surface thereof. At this time, it is strongly applied to the forming die 40 by vacuum. While being in close contact with each other, and in this process, the air cooling unit 50 and the inner cold / hot unit 48 are completely cooled, so that the wedge-shaped protrusions formed on the inner circumferential surface thereof do not deform and maintain the exact pipe shape. After passing through 20, it is possible to prevent the deformation during the cooling process.

Meanwhile, as shown in FIG. 3, the molding die 40 is divided into a portion exposed to the rear end of the sizing die 20 and a tip end inserted into the sizing die 20 and coupled to the topeto 30. It can also be configured by forming the first and second molding dies 40a and 40b, by placing the heat insulating plate 70 on the interface, and then engaging the third fastening bolt 44.

In this configuration, the second molding is performed by blocking the heat conducted from the first molding die 40a by the heat insulating plate 70 by the heat insulating plate 70 interposed between the first and second molding dies 40a and 40b. Temperature control of the die (40b) is easy to control the stable cooling is possible to form a precise wedge-shaped projection in the vacuum forming unit (45).

6 is a cross-sectional view of an embodiment in which a connecting neck is installed in a pipe extrusion molding device having a wedge-shaped protrusion formed on an inner circumferential surface according to the present invention, and FIG. 7 is a connecting neck of a pipe extrusion forming device formed with a wedge-shaped protrusion formed on an inner circumferential surface according to the present invention. As a cross-sectional view of another embodiment installed, the topeto housing extension portion 80 and the sizing die extension portion 90 is formed between the topeto housing 10 and the sizing dice 30 so that the molten resin is gradually cooled in stages. do.

That is, in order to control the cooling rate of the molten resin by extending the length of the molten resin passes in the pipe forming apparatus of FIG. 1, the topeto housing extending portion 80 is connected to the rear part of the toffee housing 10, The sizing die extension portion 90 is connected to the rear portion of the toffee housing extension portion 80 so as to be connected to the sizing dice 20.

At this time, the topeto housing 10 and the topeto housing extension portion 80 connected to the rear portion forms a bolt hole in the flange (11a) formed in the rear of the topeto housing 10 and the topeto housing extension portion 80 To form a screw hole in the fastening with the bolt (19a) to combine, to form a bolt hole in the topeto housing extension portion 80 and to form a screw hole in the topeto housing (10) to fasten the bolts (84) on both sides By tightening the bolt in the pipe forming apparatus to take a structure capable of withstanding the pressure generated in the high temperature and high pressure of the molten resin inside the pipe forming apparatus.

In addition, the sizing die extension portion 90 forms flanges 91 and 91a having bolt holes formed at both sides thereof, and one side is fastened and fixed with a bolt 92 to the screw hole at the topeto housing extension portion 80, and the other side thereof. A bolt 94 is coupled to the threaded hole formed in the flange 21 of the sizing die 20.

On the other hand, the connection between the topeto 30 and the molding die 40 in order to compensate the inner side by the length of the outer side extended by the topeto housing extension portion 80 and the sizing die extension portion 90 (85) One side of the neck (85) forms a screw portion 87 on the outer side of the end to form a screw on the inner side of the topeto (30) coupled with one side of the neck (85) 30 and the coupling neck 85 is screwed, and the forming die 40 is coupled to the other side of the coupling neck 85 is also configured to be coupled to the screw portion (86).

The sizing dice connecting portion 90 is coupled to the adjusting bolt 82 and the sizing dice connecting portion 90 fastened to a screw hole formed to the outside of the extension portion 81 formed on the rear side of the topeto housing extension portion 80. Between the sizing die connecting portion 90 and the sizing die 20 and the connecting neck 85 and the forming die 40 by adjusting bolts 96 fastened to a screw hole formed outside the extension portion of the flange 91 formed at the rear part. The thickness of the pipe can be adjusted by adjusting the spacing of.

And, 7 is the same configuration that the topeto housing extension portion 80 and the sizing die extension portion 90 of FIG. 6 is connected and corresponding to the connection neck 85 therein, the vacuum of the rear portion of the sizing dice The molding unit 23 is omitted.

A pipe extrusion molding device in which the wedge-shaped protrusions are formed on the inner circumferential surface of the present invention by the combined configuration as described above is made to produce a pipe having the wedge-shaped protrusions formed on the inner circumferential surface thereof.

When the molten resin is injected through the resin supply part 34 formed in the center of the topeto 30 in an extruder separately installed outside the toffee 30, the injected resin is formed on the outer circumferential surface of the topeto 30. The spiral protrusion 33 passes through the resin transfer part 60 more easily to reach the sizing dice 20, and is formed on the outer circumferential surface of the molding die 40 provided therein while passing through the rear portion of the sizing dice 20. The wedge-shaped projections 43 have a pipe shape in which the wedge-shaped projections 82 are formed on the inner circumferential surface, and the pipe-shaped molded product passing through the sizing dice 20 is installed at the rear end of the molding die 40. A vacuum is maintained between the pipe extruded by the vacuum forming unit 45 and the molding die 40 to maintain a vacuum, and at the same time, the outer side of the extrusion pipe 80 is cooled by an air cooling unit 50. It is to maintain the correct shape and the shape of the projection 82. The

In the above process, a plurality of heaters are installed so that molten resin does not quench while passing through the resin transfer part 60 so as to be cooled stepwise (H5 to H1).

First, the fifth external heater 14e is installed on the outer circumferential surface of the topeto 30, and the fourth and third external heaters 14d and 14c are disposed on the outer circumferential surface of the topeto housing 10 from an initial position where molten resin is injected. To install, and the second inner heater 32 is installed on the inner circumferential surface of the topeto (30) installed in the interior of the topeto housing (10). Subsequently, the second and first external heaters 14b and 14a are sequentially installed on the outer circumferential surface of the sizing die 20, and the heaters 14e are installed on the toperto 30 by installing the first inner heater 22 on the inner circumferential surface. Step to lower the temperature step by step to cool the molten resin to form and manufacture an extruded pipe formed with a wedge-shaped projection on a predetermined inner surface.

As described above, when the inner and outer heaters are operated with temperature difference step by step in the process of transferring the molten resin through the resin transfer unit 60, the molten resin gradually solidifies, so that the resin material is more stable as the resin material proceeds to the rear part. Maintains the optimum molding temperature.

In addition, the inner and outer heaters 48 installed inside the molding unit 40 and the cold / hot unit 23 installed outside the sizing dice 20 for cooling and supplying coolant or oil while operating the inner and outer heaters. When the molten resin is operated to maintain a more stable molding temperature of the resin.

Although the preferred embodiment of the present invention has been described above, the scope of the present invention is not limited thereto, and the scope of the present invention extends to the scope of the present invention to be substantially equivalent to the embodiment of the present invention. Various modifications can be made by those skilled in the art without departing from the scope of the present invention.

As can be seen from the above description, the pipe extrusion molding device in which the wedge-shaped protrusions are formed on the inner circumferential surface according to the present invention is provided with a vacuum forming unit, and vacuum is applied until the wedge-shaped protrusions formed on the inner circumferential surface of the pipe completely pass through the molding die. By maintaining close contact there is an advantage that can be molded to accurately maintain the pitch and roundness of the wedge-shaped projection.

Claims (15)

Toperto housing formed with a through hole, A through hole is formed therein and is coupled to the sizing dice coupled to the rear end of the topeto housing, Installed on the inside of the toffee housing and a tofeto formed resin supply portion on one side; A molding die coupled to the rear end of the tofeto and installed inside the sizing dice; The inner surface of the sizing die coupled to the tofeto housing and the outer space of the molding die coupled to the topeto comprises a resin conveying portion in communication with the resin supply portion, the pipe extrusion molding apparatus having a wedge-shaped projection formed on the inner peripheral surface. The method of claim 1, An air cooling unit is further provided on the outer side of the molding die, the pipe extrusion molding device having a wedge-shaped projection on the inner peripheral surface. The method of claim 1, A pipe extrusion molding device having a wedge-shaped protrusion formed on an inner circumferential surface of the rear end of the forming die, further comprising a vacuum molding unit. The method according to any one of claims 1 to 3, The forming die is a pipe extrusion molding device formed with a wedge-shaped projection on the inner peripheral surface, characterized in that the wedge-shaped projection is formed in the longitudinal direction on the outer peripheral surface. The method of claim 4, wherein The molding die is formed in the center of the through-hole, the inside of the through-hole, the first inner heater is installed, the inner side of the pipe extrusion molding apparatus having a wedge-shaped projection on the inner circumferential surface is installed. The method according to any one of claims 1 to 3, The topeto housing is a pipe extrusion machine formed with a wedge-shaped projection on the inner circumferential surface, characterized in that the third, fourth outer heater is installed on the outer circumferential surface. The method according to any one of claims 1 to 3, Topeto is a pipe extrusion machine formed with a wedge-shaped projection on the inner circumferential surface, characterized in that the spiral projection is formed on the outer circumferential surface in contact with the topeto housing. The method of claim 7, wherein The topeto is screwed with the first fastening bolt at the outer end of the topeto housing, the hollow portion is formed on the inner side is coupled with the molding die, the hollow portion is formed in the first and second through holes to communicate with the outside Pipe extrusion machine formed with a wedge-shaped projection on the inner peripheral surface characterized in. The method of claim 8, The topeto is a pipe extrusion machine formed with a wedge-shaped projection on the inner peripheral surface, characterized in that the fifth outer heater is installed on the outer peripheral surface. The method according to any one of claims 1 to 3, The sizing die pipe extrusion molding device having a wedge-shaped protrusion on the inner circumferential surface, characterized in that the molding die is formed with a portion of the tofeto inside. The method of claim 10, The outer circumferential surface of the sizing dice is a pipe extrusion molding apparatus having a wedge-shaped projection on the inner circumferential surface, characterized in that the cold and hot unit and the first, second external heater is installed, the air cooling unit support for supporting the air cooling unit is installed. The method according to any one of claims 1 to 3, The molding die is a pipe extrusion molding apparatus having a wedge-shaped protrusion on the inner circumferential surface, characterized in that the first molding die and the second molding die are combined. The method of claim 12, Pipe extrusion molding device having a wedge-shaped projection on the inner peripheral surface, characterized in that the insulating plate is interposed between the first molding die and the second molding die. The method of claim 1, A pipe extrusion molding apparatus having a wedge-shaped protrusion formed on an inner circumferential surface thereof, wherein a topeto housing extension portion and a sizing dice extension portion are formed between the topeto housing and the sizing die, and a connection neck is formed between the topeto housing and the forming die. The method of claim 14, The pipe extrusion molding apparatus having a wedge-shaped protrusion on the inner circumferential surface, characterized in that the thickness adjustment bolt is formed in the topeto housing extension portion and the sizing die extension portion.

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